What I posted is a direct cut/paste from Act 300 of 1949, aka the Michigan Vehicle Code.

Brakes on all axles.

As for the question above, legally, yes, you need brakes on both axles based on the requirements stated. Many many many people do not have them on both. You aren't going to get pulled over for it, but it is the law.

Most trailers being sold seem to just put them on one axle. My last trailer was that way.

As for chains & binders, save them for construction equipment. Ratchet straps to unsprung components, using axle slings is the best way to tie down.

I've never seen anything in the laws about tying loads, I'll go look when I have time...